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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     *<a name="line.8"></a>
<FONT color="green">009</FONT>     *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     *<a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    <a name="line.17"></a>
<FONT color="green">018</FONT>    package org.apache.commons.math.random;<a name="line.18"></a>
<FONT color="green">019</FONT>    import java.io.BufferedReader;<a name="line.19"></a>
<FONT color="green">020</FONT>    import java.io.IOException;<a name="line.20"></a>
<FONT color="green">021</FONT>    import java.io.InputStreamReader;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.net.MalformedURLException;<a name="line.22"></a>
<FONT color="green">023</FONT>    import java.net.URL;<a name="line.23"></a>
<FONT color="green">024</FONT>    <a name="line.24"></a>
<FONT color="green">025</FONT>    import org.apache.commons.math.MathRuntimeException;<a name="line.25"></a>
<FONT color="green">026</FONT>    import org.apache.commons.math.exception.util.LocalizedFormats;<a name="line.26"></a>
<FONT color="green">027</FONT>    <a name="line.27"></a>
<FONT color="green">028</FONT>    /**<a name="line.28"></a>
<FONT color="green">029</FONT>     * Generates values for use in simulation applications.<a name="line.29"></a>
<FONT color="green">030</FONT>     * &lt;p&gt;<a name="line.30"></a>
<FONT color="green">031</FONT>     * How values are generated is determined by the &lt;code&gt;mode&lt;/code&gt;<a name="line.31"></a>
<FONT color="green">032</FONT>     * property.&lt;/p&gt;<a name="line.32"></a>
<FONT color="green">033</FONT>     * &lt;p&gt;<a name="line.33"></a>
<FONT color="green">034</FONT>     * Supported &lt;code&gt;mode&lt;/code&gt; values are: &lt;ul&gt;<a name="line.34"></a>
<FONT color="green">035</FONT>     * &lt;li&gt; DIGEST_MODE -- uses an empirical distribution &lt;/li&gt;<a name="line.35"></a>
<FONT color="green">036</FONT>     * &lt;li&gt; REPLAY_MODE -- replays data from &lt;code&gt;valuesFileURL&lt;/code&gt;&lt;/li&gt;<a name="line.36"></a>
<FONT color="green">037</FONT>     * &lt;li&gt; UNIFORM_MODE -- generates uniformly distributed random values with<a name="line.37"></a>
<FONT color="green">038</FONT>     *                      mean = &lt;code&gt;mu&lt;/code&gt; &lt;/li&gt;<a name="line.38"></a>
<FONT color="green">039</FONT>     * &lt;li&gt; EXPONENTIAL_MODE -- generates exponentially distributed random values<a name="line.39"></a>
<FONT color="green">040</FONT>     *                         with mean = &lt;code&gt;mu&lt;/code&gt;&lt;/li&gt;<a name="line.40"></a>
<FONT color="green">041</FONT>     * &lt;li&gt; GAUSSIAN_MODE -- generates Gaussian distributed random values with<a name="line.41"></a>
<FONT color="green">042</FONT>     *                       mean = &lt;code&gt;mu&lt;/code&gt; and<a name="line.42"></a>
<FONT color="green">043</FONT>     *                       standard deviation = &lt;code&gt;sigma&lt;/code&gt;&lt;/li&gt;<a name="line.43"></a>
<FONT color="green">044</FONT>     * &lt;li&gt; CONSTANT_MODE -- returns &lt;code&gt;mu&lt;/code&gt; every time.&lt;/li&gt;&lt;/ul&gt;&lt;/p&gt;<a name="line.44"></a>
<FONT color="green">045</FONT>     *<a name="line.45"></a>
<FONT color="green">046</FONT>     * @version $Revision: 1003886 $ $Date: 2010-10-02 23:04:44 +0200 (sam. 02 oct. 2010) $<a name="line.46"></a>
<FONT color="green">047</FONT>     *<a name="line.47"></a>
<FONT color="green">048</FONT>     */<a name="line.48"></a>
<FONT color="green">049</FONT>    public class ValueServer {<a name="line.49"></a>
<FONT color="green">050</FONT>    <a name="line.50"></a>
<FONT color="green">051</FONT>        /** Use empirical distribution.  */<a name="line.51"></a>
<FONT color="green">052</FONT>        public static final int DIGEST_MODE = 0;<a name="line.52"></a>
<FONT color="green">053</FONT>    <a name="line.53"></a>
<FONT color="green">054</FONT>        /** Replay data from valuesFilePath. */<a name="line.54"></a>
<FONT color="green">055</FONT>        public static final int REPLAY_MODE = 1;<a name="line.55"></a>
<FONT color="green">056</FONT>    <a name="line.56"></a>
<FONT color="green">057</FONT>        /** Uniform random deviates with mean = &amp;mu;. */<a name="line.57"></a>
<FONT color="green">058</FONT>        public static final int UNIFORM_MODE = 2;<a name="line.58"></a>
<FONT color="green">059</FONT>    <a name="line.59"></a>
<FONT color="green">060</FONT>        /** Exponential random deviates with mean = &amp;mu;. */<a name="line.60"></a>
<FONT color="green">061</FONT>        public static final int EXPONENTIAL_MODE = 3;<a name="line.61"></a>
<FONT color="green">062</FONT>    <a name="line.62"></a>
<FONT color="green">063</FONT>        /** Gaussian random deviates with mean = &amp;mu;, std dev = &amp;sigma;. */<a name="line.63"></a>
<FONT color="green">064</FONT>        public static final int GAUSSIAN_MODE = 4;<a name="line.64"></a>
<FONT color="green">065</FONT>    <a name="line.65"></a>
<FONT color="green">066</FONT>        /** Always return mu */<a name="line.66"></a>
<FONT color="green">067</FONT>        public static final int CONSTANT_MODE = 5;<a name="line.67"></a>
<FONT color="green">068</FONT>    <a name="line.68"></a>
<FONT color="green">069</FONT>        /** mode determines how values are generated. */<a name="line.69"></a>
<FONT color="green">070</FONT>        private int mode = 5;<a name="line.70"></a>
<FONT color="green">071</FONT>    <a name="line.71"></a>
<FONT color="green">072</FONT>        /** URI to raw data values. */<a name="line.72"></a>
<FONT color="green">073</FONT>        private URL valuesFileURL = null;<a name="line.73"></a>
<FONT color="green">074</FONT>    <a name="line.74"></a>
<FONT color="green">075</FONT>        /** Mean for use with non-data-driven modes. */<a name="line.75"></a>
<FONT color="green">076</FONT>        private double mu = 0.0;<a name="line.76"></a>
<FONT color="green">077</FONT>    <a name="line.77"></a>
<FONT color="green">078</FONT>        /** Standard deviation for use with GAUSSIAN_MODE. */<a name="line.78"></a>
<FONT color="green">079</FONT>        private double sigma = 0.0;<a name="line.79"></a>
<FONT color="green">080</FONT>    <a name="line.80"></a>
<FONT color="green">081</FONT>        /** Empirical probability distribution for use with DIGEST_MODE. */<a name="line.81"></a>
<FONT color="green">082</FONT>        private EmpiricalDistribution empiricalDistribution = null;<a name="line.82"></a>
<FONT color="green">083</FONT>    <a name="line.83"></a>
<FONT color="green">084</FONT>        /** File pointer for REPLAY_MODE. */<a name="line.84"></a>
<FONT color="green">085</FONT>        private BufferedReader filePointer = null;<a name="line.85"></a>
<FONT color="green">086</FONT>    <a name="line.86"></a>
<FONT color="green">087</FONT>        /** RandomDataImpl to use for random data generation. */<a name="line.87"></a>
<FONT color="green">088</FONT>        private final RandomData randomData;<a name="line.88"></a>
<FONT color="green">089</FONT>    <a name="line.89"></a>
<FONT color="green">090</FONT>        // Data generation modes ======================================<a name="line.90"></a>
<FONT color="green">091</FONT>    <a name="line.91"></a>
<FONT color="green">092</FONT>        /** Creates new ValueServer */<a name="line.92"></a>
<FONT color="green">093</FONT>        public ValueServer() {<a name="line.93"></a>
<FONT color="green">094</FONT>            randomData = new RandomDataImpl();<a name="line.94"></a>
<FONT color="green">095</FONT>        }<a name="line.95"></a>
<FONT color="green">096</FONT>    <a name="line.96"></a>
<FONT color="green">097</FONT>        /**<a name="line.97"></a>
<FONT color="green">098</FONT>         * Construct a ValueServer instance using a RandomData as its source<a name="line.98"></a>
<FONT color="green">099</FONT>         * of random data.<a name="line.99"></a>
<FONT color="green">100</FONT>         *<a name="line.100"></a>
<FONT color="green">101</FONT>         * @param randomData the RandomData instance used to source random data<a name="line.101"></a>
<FONT color="green">102</FONT>         * @since 1.1<a name="line.102"></a>
<FONT color="green">103</FONT>         */<a name="line.103"></a>
<FONT color="green">104</FONT>        public ValueServer(RandomData randomData) {<a name="line.104"></a>
<FONT color="green">105</FONT>            this.randomData = randomData;<a name="line.105"></a>
<FONT color="green">106</FONT>        }<a name="line.106"></a>
<FONT color="green">107</FONT>    <a name="line.107"></a>
<FONT color="green">108</FONT>        /**<a name="line.108"></a>
<FONT color="green">109</FONT>         * Returns the next generated value, generated according<a name="line.109"></a>
<FONT color="green">110</FONT>         * to the mode value (see MODE constants).<a name="line.110"></a>
<FONT color="green">111</FONT>         *<a name="line.111"></a>
<FONT color="green">112</FONT>         * @return generated value<a name="line.112"></a>
<FONT color="green">113</FONT>         * @throws IOException in REPLAY_MODE if a file I/O error occurs<a name="line.113"></a>
<FONT color="green">114</FONT>         */<a name="line.114"></a>
<FONT color="green">115</FONT>        public double getNext() throws IOException {<a name="line.115"></a>
<FONT color="green">116</FONT>            switch (mode) {<a name="line.116"></a>
<FONT color="green">117</FONT>                case DIGEST_MODE: return getNextDigest();<a name="line.117"></a>
<FONT color="green">118</FONT>                case REPLAY_MODE: return getNextReplay();<a name="line.118"></a>
<FONT color="green">119</FONT>                case UNIFORM_MODE: return getNextUniform();<a name="line.119"></a>
<FONT color="green">120</FONT>                case EXPONENTIAL_MODE: return getNextExponential();<a name="line.120"></a>
<FONT color="green">121</FONT>                case GAUSSIAN_MODE: return getNextGaussian();<a name="line.121"></a>
<FONT color="green">122</FONT>                case CONSTANT_MODE: return mu;<a name="line.122"></a>
<FONT color="green">123</FONT>                default: throw MathRuntimeException.createIllegalStateException(<a name="line.123"></a>
<FONT color="green">124</FONT>                        LocalizedFormats.UNKNOWN_MODE,<a name="line.124"></a>
<FONT color="green">125</FONT>                        mode,<a name="line.125"></a>
<FONT color="green">126</FONT>                        "DIGEST_MODE",   DIGEST_MODE,   "REPLAY_MODE",      REPLAY_MODE,<a name="line.126"></a>
<FONT color="green">127</FONT>                        "UNIFORM_MODE",  UNIFORM_MODE,  "EXPONENTIAL_MODE", EXPONENTIAL_MODE,<a name="line.127"></a>
<FONT color="green">128</FONT>                        "GAUSSIAN_MODE", GAUSSIAN_MODE, "CONSTANT_MODE",    CONSTANT_MODE);<a name="line.128"></a>
<FONT color="green">129</FONT>            }<a name="line.129"></a>
<FONT color="green">130</FONT>        }<a name="line.130"></a>
<FONT color="green">131</FONT>    <a name="line.131"></a>
<FONT color="green">132</FONT>        /**<a name="line.132"></a>
<FONT color="green">133</FONT>         * Fills the input array with values generated using getNext() repeatedly.<a name="line.133"></a>
<FONT color="green">134</FONT>         *<a name="line.134"></a>
<FONT color="green">135</FONT>         * @param values array to be filled<a name="line.135"></a>
<FONT color="green">136</FONT>         * @throws IOException in REPLAY_MODE if a file I/O error occurs<a name="line.136"></a>
<FONT color="green">137</FONT>         */<a name="line.137"></a>
<FONT color="green">138</FONT>        public void fill(double[] values) throws IOException {<a name="line.138"></a>
<FONT color="green">139</FONT>            for (int i = 0; i &lt; values.length; i++) {<a name="line.139"></a>
<FONT color="green">140</FONT>                values[i] = getNext();<a name="line.140"></a>
<FONT color="green">141</FONT>            }<a name="line.141"></a>
<FONT color="green">142</FONT>        }<a name="line.142"></a>
<FONT color="green">143</FONT>    <a name="line.143"></a>
<FONT color="green">144</FONT>        /**<a name="line.144"></a>
<FONT color="green">145</FONT>         * Returns an array of length &lt;code&gt;length&lt;/code&gt; with values generated<a name="line.145"></a>
<FONT color="green">146</FONT>         * using getNext() repeatedly.<a name="line.146"></a>
<FONT color="green">147</FONT>         *<a name="line.147"></a>
<FONT color="green">148</FONT>         * @param length length of output array<a name="line.148"></a>
<FONT color="green">149</FONT>         * @return array of generated values<a name="line.149"></a>
<FONT color="green">150</FONT>         * @throws IOException in REPLAY_MODE if a file I/O error occurs<a name="line.150"></a>
<FONT color="green">151</FONT>         */<a name="line.151"></a>
<FONT color="green">152</FONT>        public double[] fill(int length) throws IOException {<a name="line.152"></a>
<FONT color="green">153</FONT>            double[] out = new double[length];<a name="line.153"></a>
<FONT color="green">154</FONT>            for (int i = 0; i &lt; length; i++) {<a name="line.154"></a>
<FONT color="green">155</FONT>                out[i] = getNext();<a name="line.155"></a>
<FONT color="green">156</FONT>            }<a name="line.156"></a>
<FONT color="green">157</FONT>            return out;<a name="line.157"></a>
<FONT color="green">158</FONT>        }<a name="line.158"></a>
<FONT color="green">159</FONT>    <a name="line.159"></a>
<FONT color="green">160</FONT>        /**<a name="line.160"></a>
<FONT color="green">161</FONT>         * Computes the empirical distribution using values from the file<a name="line.161"></a>
<FONT color="green">162</FONT>         * in &lt;code&gt;valuesFileURL&lt;/code&gt;, using the default number of bins.<a name="line.162"></a>
<FONT color="green">163</FONT>         * &lt;p&gt;<a name="line.163"></a>
<FONT color="green">164</FONT>         * &lt;code&gt;valuesFileURL&lt;/code&gt; must exist and be<a name="line.164"></a>
<FONT color="green">165</FONT>         * readable by *this at runtime.&lt;/p&gt;<a name="line.165"></a>
<FONT color="green">166</FONT>         * &lt;p&gt;<a name="line.166"></a>
<FONT color="green">167</FONT>         * This method must be called before using &lt;code&gt;getNext()&lt;/code&gt;<a name="line.167"></a>
<FONT color="green">168</FONT>         * with &lt;code&gt;mode = DIGEST_MODE&lt;/code&gt;&lt;/p&gt;<a name="line.168"></a>
<FONT color="green">169</FONT>         *<a name="line.169"></a>
<FONT color="green">170</FONT>         * @throws IOException if an I/O error occurs reading the input file<a name="line.170"></a>
<FONT color="green">171</FONT>         */<a name="line.171"></a>
<FONT color="green">172</FONT>        public void computeDistribution() throws IOException {<a name="line.172"></a>
<FONT color="green">173</FONT>            empiricalDistribution = new EmpiricalDistributionImpl();<a name="line.173"></a>
<FONT color="green">174</FONT>            empiricalDistribution.load(valuesFileURL);<a name="line.174"></a>
<FONT color="green">175</FONT>        }<a name="line.175"></a>
<FONT color="green">176</FONT>    <a name="line.176"></a>
<FONT color="green">177</FONT>        /**<a name="line.177"></a>
<FONT color="green">178</FONT>         * Computes the empirical distribution using values from the file<a name="line.178"></a>
<FONT color="green">179</FONT>         * in &lt;code&gt;valuesFileURL&lt;/code&gt; and &lt;code&gt;binCount&lt;/code&gt; bins.<a name="line.179"></a>
<FONT color="green">180</FONT>         * &lt;p&gt;<a name="line.180"></a>
<FONT color="green">181</FONT>         * &lt;code&gt;valuesFileURL&lt;/code&gt; must exist and be readable by this process<a name="line.181"></a>
<FONT color="green">182</FONT>         * at runtime.&lt;/p&gt;<a name="line.182"></a>
<FONT color="green">183</FONT>         * &lt;p&gt;<a name="line.183"></a>
<FONT color="green">184</FONT>         * This method must be called before using &lt;code&gt;getNext()&lt;/code&gt;<a name="line.184"></a>
<FONT color="green">185</FONT>         * with &lt;code&gt;mode = DIGEST_MODE&lt;/code&gt;&lt;/p&gt;<a name="line.185"></a>
<FONT color="green">186</FONT>         *<a name="line.186"></a>
<FONT color="green">187</FONT>         * @param binCount the number of bins used in computing the empirical<a name="line.187"></a>
<FONT color="green">188</FONT>         * distribution<a name="line.188"></a>
<FONT color="green">189</FONT>         * @throws IOException if an error occurs reading the input file<a name="line.189"></a>
<FONT color="green">190</FONT>         */<a name="line.190"></a>
<FONT color="green">191</FONT>        public void computeDistribution(int binCount)<a name="line.191"></a>
<FONT color="green">192</FONT>                throws IOException {<a name="line.192"></a>
<FONT color="green">193</FONT>            empiricalDistribution = new EmpiricalDistributionImpl(binCount);<a name="line.193"></a>
<FONT color="green">194</FONT>            empiricalDistribution.load(valuesFileURL);<a name="line.194"></a>
<FONT color="green">195</FONT>            mu = empiricalDistribution.getSampleStats().getMean();<a name="line.195"></a>
<FONT color="green">196</FONT>            sigma = empiricalDistribution.getSampleStats().getStandardDeviation();<a name="line.196"></a>
<FONT color="green">197</FONT>        }<a name="line.197"></a>
<FONT color="green">198</FONT>    <a name="line.198"></a>
<FONT color="green">199</FONT>        /** Getter for property mode.<a name="line.199"></a>
<FONT color="green">200</FONT>         * @return Value of property mode.<a name="line.200"></a>
<FONT color="green">201</FONT>         */<a name="line.201"></a>
<FONT color="green">202</FONT>        public int getMode() {<a name="line.202"></a>
<FONT color="green">203</FONT>            return mode;<a name="line.203"></a>
<FONT color="green">204</FONT>        }<a name="line.204"></a>
<FONT color="green">205</FONT>    <a name="line.205"></a>
<FONT color="green">206</FONT>        /** Setter for property mode.<a name="line.206"></a>
<FONT color="green">207</FONT>         * @param mode New value of property mode.<a name="line.207"></a>
<FONT color="green">208</FONT>         */<a name="line.208"></a>
<FONT color="green">209</FONT>        public void setMode(int mode) {<a name="line.209"></a>
<FONT color="green">210</FONT>            this.mode = mode;<a name="line.210"></a>
<FONT color="green">211</FONT>        }<a name="line.211"></a>
<FONT color="green">212</FONT>    <a name="line.212"></a>
<FONT color="green">213</FONT>        /**<a name="line.213"></a>
<FONT color="green">214</FONT>         * Getter for &lt;code&gt;valuesFileURL&lt;code&gt;<a name="line.214"></a>
<FONT color="green">215</FONT>         * @return Value of property valuesFileURL.<a name="line.215"></a>
<FONT color="green">216</FONT>         */<a name="line.216"></a>
<FONT color="green">217</FONT>        public URL getValuesFileURL() {<a name="line.217"></a>
<FONT color="green">218</FONT>            return valuesFileURL;<a name="line.218"></a>
<FONT color="green">219</FONT>        }<a name="line.219"></a>
<FONT color="green">220</FONT>    <a name="line.220"></a>
<FONT color="green">221</FONT>        /**<a name="line.221"></a>
<FONT color="green">222</FONT>         * Sets the &lt;code&gt;valuesFileURL&lt;/code&gt; using a string URL representation<a name="line.222"></a>
<FONT color="green">223</FONT>         * @param url String representation for new valuesFileURL.<a name="line.223"></a>
<FONT color="green">224</FONT>         * @throws MalformedURLException if url is not well formed<a name="line.224"></a>
<FONT color="green">225</FONT>         */<a name="line.225"></a>
<FONT color="green">226</FONT>        public void setValuesFileURL(String url) throws MalformedURLException {<a name="line.226"></a>
<FONT color="green">227</FONT>            this.valuesFileURL = new URL(url);<a name="line.227"></a>
<FONT color="green">228</FONT>        }<a name="line.228"></a>
<FONT color="green">229</FONT>    <a name="line.229"></a>
<FONT color="green">230</FONT>        /**<a name="line.230"></a>
<FONT color="green">231</FONT>         * Sets the &lt;code&gt;valuesFileURL&lt;/code&gt;<a name="line.231"></a>
<FONT color="green">232</FONT>         * @param url New value of property valuesFileURL.<a name="line.232"></a>
<FONT color="green">233</FONT>         */<a name="line.233"></a>
<FONT color="green">234</FONT>        public void setValuesFileURL(URL url) {<a name="line.234"></a>
<FONT color="green">235</FONT>            this.valuesFileURL = url;<a name="line.235"></a>
<FONT color="green">236</FONT>        }<a name="line.236"></a>
<FONT color="green">237</FONT>    <a name="line.237"></a>
<FONT color="green">238</FONT>        /** Getter for property empiricalDistribution.<a name="line.238"></a>
<FONT color="green">239</FONT>         * @return Value of property empiricalDistribution.<a name="line.239"></a>
<FONT color="green">240</FONT>         */<a name="line.240"></a>
<FONT color="green">241</FONT>        public EmpiricalDistribution getEmpiricalDistribution() {<a name="line.241"></a>
<FONT color="green">242</FONT>            return empiricalDistribution;<a name="line.242"></a>
<FONT color="green">243</FONT>        }<a name="line.243"></a>
<FONT color="green">244</FONT>    <a name="line.244"></a>
<FONT color="green">245</FONT>        /**<a name="line.245"></a>
<FONT color="green">246</FONT>         * Resets REPLAY_MODE file pointer to the beginning of the &lt;code&gt;valuesFileURL&lt;/code&gt;.<a name="line.246"></a>
<FONT color="green">247</FONT>         *<a name="line.247"></a>
<FONT color="green">248</FONT>         * @throws IOException if an error occurs opening the file<a name="line.248"></a>
<FONT color="green">249</FONT>         */<a name="line.249"></a>
<FONT color="green">250</FONT>        public void resetReplayFile() throws IOException {<a name="line.250"></a>
<FONT color="green">251</FONT>            if (filePointer != null) {<a name="line.251"></a>
<FONT color="green">252</FONT>                try {<a name="line.252"></a>
<FONT color="green">253</FONT>                    filePointer.close();<a name="line.253"></a>
<FONT color="green">254</FONT>                    filePointer = null;<a name="line.254"></a>
<FONT color="green">255</FONT>                } catch (IOException ex) {<a name="line.255"></a>
<FONT color="green">256</FONT>                    // ignore<a name="line.256"></a>
<FONT color="green">257</FONT>                }<a name="line.257"></a>
<FONT color="green">258</FONT>            }<a name="line.258"></a>
<FONT color="green">259</FONT>            filePointer = new BufferedReader(new InputStreamReader(valuesFileURL.openStream()));<a name="line.259"></a>
<FONT color="green">260</FONT>        }<a name="line.260"></a>
<FONT color="green">261</FONT>    <a name="line.261"></a>
<FONT color="green">262</FONT>        /**<a name="line.262"></a>
<FONT color="green">263</FONT>         * Closes &lt;code&gt;valuesFileURL&lt;/code&gt; after use in REPLAY_MODE.<a name="line.263"></a>
<FONT color="green">264</FONT>         *<a name="line.264"></a>
<FONT color="green">265</FONT>         * @throws IOException if an error occurs closing the file<a name="line.265"></a>
<FONT color="green">266</FONT>         */<a name="line.266"></a>
<FONT color="green">267</FONT>        public void closeReplayFile() throws IOException {<a name="line.267"></a>
<FONT color="green">268</FONT>            if (filePointer != null) {<a name="line.268"></a>
<FONT color="green">269</FONT>                filePointer.close();<a name="line.269"></a>
<FONT color="green">270</FONT>                filePointer = null;<a name="line.270"></a>
<FONT color="green">271</FONT>            }<a name="line.271"></a>
<FONT color="green">272</FONT>        }<a name="line.272"></a>
<FONT color="green">273</FONT>    <a name="line.273"></a>
<FONT color="green">274</FONT>        /** Getter for property mu.<a name="line.274"></a>
<FONT color="green">275</FONT>         * @return Value of property mu.<a name="line.275"></a>
<FONT color="green">276</FONT>         */<a name="line.276"></a>
<FONT color="green">277</FONT>        public double getMu() {<a name="line.277"></a>
<FONT color="green">278</FONT>            return mu;<a name="line.278"></a>
<FONT color="green">279</FONT>        }<a name="line.279"></a>
<FONT color="green">280</FONT>    <a name="line.280"></a>
<FONT color="green">281</FONT>        /** Setter for property mu.<a name="line.281"></a>
<FONT color="green">282</FONT>         * @param mu New value of property mu.<a name="line.282"></a>
<FONT color="green">283</FONT>         */<a name="line.283"></a>
<FONT color="green">284</FONT>        public void setMu(double mu) {<a name="line.284"></a>
<FONT color="green">285</FONT>            this.mu = mu;<a name="line.285"></a>
<FONT color="green">286</FONT>        }<a name="line.286"></a>
<FONT color="green">287</FONT>    <a name="line.287"></a>
<FONT color="green">288</FONT>        /** Getter for property sigma.<a name="line.288"></a>
<FONT color="green">289</FONT>         * @return Value of property sigma.<a name="line.289"></a>
<FONT color="green">290</FONT>         */<a name="line.290"></a>
<FONT color="green">291</FONT>        public double getSigma() {<a name="line.291"></a>
<FONT color="green">292</FONT>            return sigma;<a name="line.292"></a>
<FONT color="green">293</FONT>        }<a name="line.293"></a>
<FONT color="green">294</FONT>    <a name="line.294"></a>
<FONT color="green">295</FONT>        /** Setter for property sigma.<a name="line.295"></a>
<FONT color="green">296</FONT>         * @param sigma New value of property sigma.<a name="line.296"></a>
<FONT color="green">297</FONT>         */<a name="line.297"></a>
<FONT color="green">298</FONT>        public void setSigma(double sigma) {<a name="line.298"></a>
<FONT color="green">299</FONT>            this.sigma = sigma;<a name="line.299"></a>
<FONT color="green">300</FONT>        }<a name="line.300"></a>
<FONT color="green">301</FONT>    <a name="line.301"></a>
<FONT color="green">302</FONT>        //------------- private methods ---------------------------------<a name="line.302"></a>
<FONT color="green">303</FONT>    <a name="line.303"></a>
<FONT color="green">304</FONT>        /**<a name="line.304"></a>
<FONT color="green">305</FONT>         * Gets a random value in DIGEST_MODE.<a name="line.305"></a>
<FONT color="green">306</FONT>         * &lt;p&gt;<a name="line.306"></a>
<FONT color="green">307</FONT>         * &lt;strong&gt;Preconditions&lt;/strong&gt;: &lt;ul&gt;<a name="line.307"></a>
<FONT color="green">308</FONT>         * &lt;li&gt;Before this method is called, &lt;code&gt;computeDistribution()&lt;/code&gt;<a name="line.308"></a>
<FONT color="green">309</FONT>         * must have completed successfully; otherwise an<a name="line.309"></a>
<FONT color="green">310</FONT>         * &lt;code&gt;IllegalStateException&lt;/code&gt; will be thrown&lt;/li&gt;&lt;/ul&gt;&lt;/p&gt;<a name="line.310"></a>
<FONT color="green">311</FONT>         *<a name="line.311"></a>
<FONT color="green">312</FONT>         * @return next random value from the empirical distribution digest<a name="line.312"></a>
<FONT color="green">313</FONT>         */<a name="line.313"></a>
<FONT color="green">314</FONT>        private double getNextDigest() {<a name="line.314"></a>
<FONT color="green">315</FONT>            if ((empiricalDistribution == null) ||<a name="line.315"></a>
<FONT color="green">316</FONT>                (empiricalDistribution.getBinStats().size() == 0)) {<a name="line.316"></a>
<FONT color="green">317</FONT>                throw MathRuntimeException.createIllegalStateException(LocalizedFormats.DIGEST_NOT_INITIALIZED);<a name="line.317"></a>
<FONT color="green">318</FONT>            }<a name="line.318"></a>
<FONT color="green">319</FONT>            return empiricalDistribution.getNextValue();<a name="line.319"></a>
<FONT color="green">320</FONT>        }<a name="line.320"></a>
<FONT color="green">321</FONT>    <a name="line.321"></a>
<FONT color="green">322</FONT>        /**<a name="line.322"></a>
<FONT color="green">323</FONT>         * Gets next sequential value from the &lt;code&gt;valuesFileURL&lt;/code&gt;.<a name="line.323"></a>
<FONT color="green">324</FONT>         * &lt;p&gt;<a name="line.324"></a>
<FONT color="green">325</FONT>         * Throws an IOException if the read fails.&lt;/p&gt;<a name="line.325"></a>
<FONT color="green">326</FONT>         * &lt;p&gt;<a name="line.326"></a>
<FONT color="green">327</FONT>         * This method will open the &lt;code&gt;valuesFileURL&lt;/code&gt; if there is no<a name="line.327"></a>
<FONT color="green">328</FONT>         * replay file open.&lt;/p&gt;<a name="line.328"></a>
<FONT color="green">329</FONT>         * &lt;p&gt;<a name="line.329"></a>
<FONT color="green">330</FONT>         * The &lt;code&gt;valuesFileURL&lt;/code&gt; will be closed and reopened to wrap around<a name="line.330"></a>
<FONT color="green">331</FONT>         * from EOF to BOF if EOF is encountered. EOFException (which is a kind of<a name="line.331"></a>
<FONT color="green">332</FONT>         * IOException) may still be thrown if the &lt;code&gt;valuesFileURL&lt;/code&gt; is<a name="line.332"></a>
<FONT color="green">333</FONT>         * empty.&lt;/p&gt;<a name="line.333"></a>
<FONT color="green">334</FONT>         *<a name="line.334"></a>
<FONT color="green">335</FONT>         * @return next value from the replay file<a name="line.335"></a>
<FONT color="green">336</FONT>         * @throws IOException if there is a problem reading from the file<a name="line.336"></a>
<FONT color="green">337</FONT>         * @throws NumberFormatException if an invalid numeric string is<a name="line.337"></a>
<FONT color="green">338</FONT>         *   encountered in the file<a name="line.338"></a>
<FONT color="green">339</FONT>         */<a name="line.339"></a>
<FONT color="green">340</FONT>        private double getNextReplay() throws IOException {<a name="line.340"></a>
<FONT color="green">341</FONT>            String str = null;<a name="line.341"></a>
<FONT color="green">342</FONT>            if (filePointer == null) {<a name="line.342"></a>
<FONT color="green">343</FONT>                resetReplayFile();<a name="line.343"></a>
<FONT color="green">344</FONT>            }<a name="line.344"></a>
<FONT color="green">345</FONT>            if ((str = filePointer.readLine()) == null) {<a name="line.345"></a>
<FONT color="green">346</FONT>                // we have probably reached end of file, wrap around from EOF to BOF<a name="line.346"></a>
<FONT color="green">347</FONT>                closeReplayFile();<a name="line.347"></a>
<FONT color="green">348</FONT>                resetReplayFile();<a name="line.348"></a>
<FONT color="green">349</FONT>                if ((str = filePointer.readLine()) == null) {<a name="line.349"></a>
<FONT color="green">350</FONT>                    throw MathRuntimeException.createEOFException(LocalizedFormats.URL_CONTAINS_NO_DATA,<a name="line.350"></a>
<FONT color="green">351</FONT>                                                                  valuesFileURL);<a name="line.351"></a>
<FONT color="green">352</FONT>                }<a name="line.352"></a>
<FONT color="green">353</FONT>            }<a name="line.353"></a>
<FONT color="green">354</FONT>            return Double.valueOf(str).doubleValue();<a name="line.354"></a>
<FONT color="green">355</FONT>        }<a name="line.355"></a>
<FONT color="green">356</FONT>    <a name="line.356"></a>
<FONT color="green">357</FONT>        /**<a name="line.357"></a>
<FONT color="green">358</FONT>         * Gets a uniformly distributed random value with mean = mu.<a name="line.358"></a>
<FONT color="green">359</FONT>         *<a name="line.359"></a>
<FONT color="green">360</FONT>         * @return random uniform value<a name="line.360"></a>
<FONT color="green">361</FONT>         */<a name="line.361"></a>
<FONT color="green">362</FONT>        private double getNextUniform() {<a name="line.362"></a>
<FONT color="green">363</FONT>            return randomData.nextUniform(0, 2 * mu);<a name="line.363"></a>
<FONT color="green">364</FONT>        }<a name="line.364"></a>
<FONT color="green">365</FONT>    <a name="line.365"></a>
<FONT color="green">366</FONT>        /**<a name="line.366"></a>
<FONT color="green">367</FONT>         * Gets an exponentially distributed random value with mean = mu.<a name="line.367"></a>
<FONT color="green">368</FONT>         *<a name="line.368"></a>
<FONT color="green">369</FONT>         * @return random exponential value<a name="line.369"></a>
<FONT color="green">370</FONT>         */<a name="line.370"></a>
<FONT color="green">371</FONT>        private double getNextExponential() {<a name="line.371"></a>
<FONT color="green">372</FONT>            return randomData.nextExponential(mu);<a name="line.372"></a>
<FONT color="green">373</FONT>        }<a name="line.373"></a>
<FONT color="green">374</FONT>    <a name="line.374"></a>
<FONT color="green">375</FONT>        /**<a name="line.375"></a>
<FONT color="green">376</FONT>         * Gets a Gaussian distributed random value with mean = mu<a name="line.376"></a>
<FONT color="green">377</FONT>         * and standard deviation = sigma.<a name="line.377"></a>
<FONT color="green">378</FONT>         *<a name="line.378"></a>
<FONT color="green">379</FONT>         * @return random Gaussian value<a name="line.379"></a>
<FONT color="green">380</FONT>         */<a name="line.380"></a>
<FONT color="green">381</FONT>        private double getNextGaussian() {<a name="line.381"></a>
<FONT color="green">382</FONT>            return randomData.nextGaussian(mu, sigma);<a name="line.382"></a>
<FONT color="green">383</FONT>        }<a name="line.383"></a>
<FONT color="green">384</FONT>    <a name="line.384"></a>
<FONT color="green">385</FONT>    }<a name="line.385"></a>




























































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